Tire retreading machine



Aug. 1, 1933. N. FEINEN 1,920,852

TIRE RETREADING MACHINE Filed Oct. 14, 1931 4 Sheets-Sheet l 9657 wmussga M OTATTORNEY Aug. l, 1933. N FElNEN 1,9270;852

TIRE RETREADING MACHINE Filed Oct. 14, 1951 4 Sheets-Sheet 2 Z7 g J7 ,91,015 J f al 16 J j? J5 9*? v M 19 e (12 z/f `K t?, 00M 1 Q o 4 9.0 J3 29/' l 9.9i; 3 d ya' 37 ggm I O1 I* \O 9740 gg i 38 0 'I 88 4 *uw o I IOC l O Oo w; I g 37 e@ -O V 3631 0 l Eo ,d 75l w E? 6 ,i l v 2a' 2 u g 6 a: ATTORNEY Aug. 1, 1933. N, FEWEN 1,920,852

' TIRE RETREADING MACHINE Filed OOb. v14, 1951 4 Sheets-Sheet 3 INVENTOR Aug. 1, 1933. N FElNEN TIRE RETREADING MACHINE Filed Oct. 14, 1931 4 Sheets-Sheet 4 llllllIlIllIIlll/llIlIllll/Il Patented Aug. l, 1933 UNITED] STATES .Plummero1=1=1c1:-

17,920,852 TIRE RETRADING MACHINE Nicholas' reinen,l Buffalo, NQY; Application october 14, 1931. serial No. 568,818v a cmims. (cl, en -zt) This invention relates to tire retreading' machines and .has for the primaryobject, the provision of a device especially adapted for forming non-skid lsurfaces on motor vehicle"tires after i such tires havel been worn and becornesmooth, thereby restoring non-skid qualities to the tires so that skiddingwill be reduced to a minilnum.A Another object of this invention is the proy Vision of means whereby rib type treads or` vacuum type treads maybe made on the smooth tread surfaces of Worn tires.

With 'these and other objects in view, this invention consists in certain novel features of construction, combination. and. arrangement of l5 parts to behereinafter more fully-describedand claimed. 1

Fora complete understanding of `my invention,v reference is to be had to the following descriptioh and accompanying drawings, in which Figure 1 is a top plan View partly in section illustrating a tire retreadinginachine constructed "jin accordance with ymy invention.

Figure 2 is a sectional view-.taken on the line 2 2 of Figure 1., l 1

Figure 3' isa sectional view taken onthe line '3-3of Figure 2.

Figure 4 is a sectional View taken on the line 4-4 of Figure 3. Figure 5 is a side elevation illustrating a wheel attaching plate.

Figure 6 is a detail-sectional View taken on` the line 6--6 of Figure 4.

Figure 7 is a detail sectional view taken on the line 7--7 of Figure 4.

Figure 8,is a fragmentary sectional view i1- lustrating the drive means for one, of thecutters. Figure 9 is a detail sectional viewtaken on the line 9;-'9 of Figure 8.

Figur'e 10 isl a fragmentary bottom plan view illustrating one of the, cutters employedffor forming a vacuum type tread. a

Figure. llf lustratin'gthefsame associated with the tread of 45. a tire.

Figure" 12 Tis` a fragr-nentary` top plan view illustrating Ione of the Acutters for forming the' rib type tread.

Figure `13 1s aaetan `sectional* View iliustratf Ving the cutterfor .forming the rib type tread.

Figure 14 is a sectional view taken on the' line 14-14 of Figure 3. f 1 y Referringl in detail tothe drawings; the numeral 1 indicates a base having formed central- `ly thereon a gear housing 2 provided with' a vertically disposed tubular standard 3 supportis a fragmentary sectional view 'iling atits Aupper end a gear housing 4. An elec-L tric motor or other power source 5 is mounted on the base 1 with the shaft 6 thereof extending through the gear housing 2 and also into gear boxes'7 mounted onthe base 1. A worm 8'is 6o secured to the shaft 6 within the gear housing 2 and meshes with a worm gear 9 secured to the lower end o f a shaft 10 journalled in the tubular standard 3 and has secured to its upper end a bevelled gear 11 for operating shafts of tire 65 treading devices. l l I f Extending radially from the gearhousing 4 are shaft casings 12 terminating into clutch housings 13. Shafts 14 are journalled in the casings 12 and extend into the gear housing 4. 70 and have secured thereto bevelledgears 1-5meshingwith the bevelled gear 11.`. A The outer endsof the shafts extend into the clutch housings 13 and have associated therewith clutches 16 con-` trolled byv pivotally mounted. hand leversf17'75 `which may be moved into and held in. various adjusted positions for engaging l and disengaging the clutches. lShafts 18` are connected to the clutches 16 and one pair of said shafts l18 are provided with universal joints 19.to permit the outer ends of the shafts to be moved relative to the inner ends of the clutches. Said pair of "shafts 18 extend into gear boxes 20 of the tread forming devices. The outer portions of the shafts v 18 are sectional and have sliding relation so that 85 the tread forming devices may be adjusted relative to tires supported by the machine. The sectional portions of the shafts 18 are locked in;- various adjusted positions by set bolts 21 having handles 22. `The shafts 18 are surrounded by 90 telescopic casings 23, one. section of each casing lhinged toits respective clutch housing 13 while its companion section is formed on its respective tread forming device.

The set bolts l21 are carried by the sections ,of the telescopic shaft casings 23'for the purpose of permittingthe sections to'be adjusted and held in any of theiradjusted positions and 'consequently hold the sectionalportions of the shafts 18 in their adjusted positions. Stops or rests 24 arecarried by clutch 100 housings for limiting thedownwardmovements lof the tire treading devices.-

l l The clutch housings are supported' by standn ards 25l mounted on the base and theshaft casings 12 aresupportedby standards 26 mounted 105 on the gear housing 2. The standards 25 and 26 are connected in pairs by braces 27 to which are journalledl feed screws. 28 having. hand;

pieces 29.` IHeads 30 are slidably mounted on the pairs of standards 25 and A26 and have threaded 110 engagement with the feed screws 28 whereby l-s'aid headsmay be adjusted upwardly and down- 'I'he shafts 32 have secured thereto worm gears 1 38 vand one pair of worm gears is in mesh with worms 39 secured to hand operated shafts"40" whereby the respective vehicle wheels be rotated as desired. The other pair of worm gears 38 are in mesh with worms 41secured to ad-h justable shafts 42 extending into the gear b oxes 7 and are connected to the shaft 6 of the electric motor by suitable clutches controlled by the foot levers 43 mounted' yon the vvbase `1 thusit willv be seen that one pair of vehicle wheels supported by the machinel may be rotated bythe electric-motor and the tires o f these wheelsare i adapted to'have the rib typetread'formed thereon', while the Lotherpair of 'tiresfsupported by the machine are moved by hand throughthe hand shafts `40 and are adapted vtoha;ve ..the...vacuum type formed thereon. v;

The gear! housings 20 form part yof onepa-ir oi'- the retreading devices and each is provided with a handle 44 for adjusting the' retreading devices relative to the-tires. YOne pair of thelretreading devices4 comprises pairs of recess' cutters 45 con... nected together by gears 4 6 which aredriven. by the shafts 18'by gears 47. Withthecutters. and brought into `eng'ageme nty with the treads of the respective tires,. a vvacuum retread will be formed onthe tires by4 malringfin. fthe treadsv of the tiresrelativelyspaced s oclets.

AssociatedA with the'cutters 45am guide pins 48. whicharecarried*by'therespective gear :noussupporting means, a. shaft journaled'in thehousing, power meanszon the base; means 'connectng 'the power means to the shai't,v anadjustablem 45 rotating ings 20 for the purpose of aiding in spacing the sockets in the tread of the .respective'- tire. -It

being .understood thatv th'e guide elements :are

positioned so as to' enter the last socket formed in lthe Itreadoffthe v'tir-esso that thenext pair of'sockets made-by the cutters 45 Will be evenly spaced :from the alreadyfformed sockets'. 'Dur-1v the rforming" of the sockets in the treads-ofv the worn tires by the cutters l4 5 it' is to be under- 4 stood that after each;cuttingl hand operated shafts 40.

The other pair oftread' forming devices designedto forni the rib tread 4to the. tires isarranged, in an' oppositely disposed pair and each includes a head 49 formed integral with the shaft casing 23 with the outer endof the shaft 18 jc'iurnalledv -therein and carrying relatively spaced rotatingl cutters '50 adapted to cut circumferential grooves inthe tread'of thetirel` The head 49 has hinged curedto the head 4 9 and is apertured to-receive a screw'threadedr stem 55 'formed'.on the head Gauge rollers 57 are carried bythe 4housing 54 and are arranged on opposite sidesfofv the-circular cutters for Vvthe rib threads formed thereon are rotated by the 4act on a tire carried by' opratinphe 13k,means,andimeans` impartingmovement to the spective tires are turnedorjadva'nced by the..

ting means, and' means'v for rotating the tire sup-. -portingmeans4 -and to which an adjusting nut 56.. is..threaded.

purpose of gauging the depth in which the cutters may form the'grooves in the tread of the tire. By adjusting the nut 56 on the stem 55, the gauge rollers 57 may be varied relative to the circular cutters and thereby permit deeper or shallower grooves to be formed in different tires. 'I'he head 49 is provided with slots 58 to accommodate the pintles of the guide rollers 57 and permit adjustment of said guide rollers relative to the cutters.

Withtheshafts 118 attached lto,v the "cutters 50 rotating said cutters will-.form `relatively spaced grooves in the respective tires, the depth of the grooves being regulated by the gauge rollers 57. It. is to be understood that the tires having the -motor'5 by operating the treadles 43.

This .device is especially devised for forming non-skid treads on large sized tires which have .been worn to'an"` extent that their ordinary nonskid .has disappeared leaving the threads of the tires smooth. Large sized tires when in this state' still y.have a treadrofi considerable "thickness and capable of- .:use for a=-1ong"ti1n'e o ijls'till have many milesof service left in them," but due to theirismooth surfaces theirtraction obtaining qualities are greatly reducedfand to restore-these qualities my. maohineiscmployed. Fromthe foregoing it will be' noted that 'non'- skid treads can; be easily formed-in the worn tiresby-mountingthemfupo'n-'the' machine while 1 05 theystillremainmounted upon theirrespective Wheels and that non-skid treads'offthe'rib or vacuum type may be made therein; f

,while 1,.- have shown and-:described theprejferred embodiment ofl invention, *it willbe' understood that minoruchan'ges'inconstructiom combination and arrangement of parts may be made without departing from-the spirit and scope of-my invention,=a's claimed.

1. ,A Atread forming device A'col'nprising fa`-l base, vertical supporting. means on' thel "base, a horizontal vshaft and 1clutch housing carried by" said .120

shaft carried .byhthe housing-3a clutch 'in -the housing and connecting the shafts, tire suppoi'i'lf` tire supporting means. y13() 2. A treadforming' devicec'omprising a gbase,

vertical supporting means onthejbase; ja horizontal shaft and clutch housing carried by said supporting means, shafts journaidin'said housing" and one. of said shafts adjustable as mlengtnw.Y

and movablejangularly with respect to' said housing, a power means carriedlby the base, meansl connecting vthe power means to 'one'ofthe shafts., cutters carried by and vactuated from the otherl shaft, a clutch in the housingfor connecting the vertical supporting means; and jmeans .'frf.

adjusting the tire supporting means to jrno'veaf' tire .carried thereby' towards arid from the cut- 3. A tread forming device comprising-:abwegvertical supporting` means on the base, a horizonltal shaft and clutch?h'ousingfcarriedby said supporting means, power means'o'n the'base, shafts 14o., said shafts, tire-supportmgfmeans slidabie on'.

carried by said yieldable supporting means, means for adjusting said yieldable supporting means, a rotatable tire carrier adjustably mounted on the vertical supporting means to support a tire to the cutters and gage rollers, and means for rotating the tire carrier.

NICHOLAS FEINEN. 

